ConvetXtoDvd-Freezes or Stops?

Hello, I have been using ConvertXtoDvd for some time now, and it has replaced NeroVision express as my choice for high quality conversions of avi and mpeg files to DVD. I never had any problems until recently when I noticed many of my burned Dvd’s would freeze or stop after usually a few seconds of playing. I even could put 2 movies before, one 1 disk with no problems, but not now. Could this be a codec problem? I had installed the Ace mega codec pack-professional, which may provide more codecs, resulting in a conflict than I know. I did this because i used to have problems with the AC3 codec working for ac3 movies, no sound. Should I uninstall Ace, and what codec pack(s) would you recommend to download, if indeed you think this may be the problem? I use Nero 7 to burn with.

Thank you for your help!

I’ve never read that installing a codec pack is a good thing. I wouldn’t use one because of the potential for conflicts. Install only what you need.